Chances of getting pregnant?

I've never had it happen from woohoo in any version of the game that I have played including 4 now. I can say that there is a whole lot of woohoo happening in my game as well. Lol. It sounds like it is rare but possible. Trying for a baby has usually been successful in one try. I've only had one failed pregnancy test. My most recent couple to have a baby does seem to have had infertility. They tried for a baby three times over a Sim week and nothing was happening until the woman took a pregnancy test after the third try and got a positive. She had one baby, so the other two tries were failures.

I don't know if my game has a bug regarding getting pregnant without a pregnancy test but I don't really mind. I decided that they had some infertility and had to try harder than most to get pregnant. I was pretty glad that they just had one. I have not had any multiples in this version of the game but I have also pointedly avoided doing the things that encourage multiples. More power to the people who like playing with multiples but unless it randomly happens in my game, it probably won't happen. No fertility massages or treatments for my Sims.